Spirits in Vodou are known as Loa; Catholic Saints lithographs are used to represent them. During slavery in Haiti, white french masters forbade the slaves from pursuing Vodou as a religion and anyone caught practicing any religion other than Catholicism were severely punished. The slaves, still deeply attached to their African roots, were obliged to use Catholic Saint Image during Vodou ceremonies, pretending to be praying to them while deep in their heart they were praying to their African gods. This is the main characteristic that differentiate the Vodou that is practiced in Haiti and in Africa. Over 400 years have passed, but the tradition strangely still remain today; it is so deeply rooted in the religion that it is almost impossible to even imagine Haitian Vodou without the representation of the Loas with Catholic Saints' images.

Agaou is the god who rules over thunder, rain, lightning, wind, storm and earthquake. Very powerfull and violent, Agaou is feared and respected by all. It is said that when the earth tremors, it is because Agaou is angry. One has to be very strong to harbor this spirit. His possessions are so violent, there have been deaths associated with them. Even Mambo and Hougan are affraid of this spirit. When Agaou comes in possession people are trembling of fear cause his voice is like the thunder itself and he's always ready to beat those who do not serve him correctly, with his machette or sword. In possession he keeps repeating " It is I who am the gunner of God; when I roar the earth trembles." The image of St Michel is used to represent Agaou.

Alternatives :Agaou Wèdo, Agaou Tonnè( Agaou the Thunder) Agaou Loray( Agaou the Orage) Agaou Zèklè ( Agaou the Lightning) Agaou Lefan(Agaou the Elephant), .( who was a king of an Arada group in Africa and the father of the great ),Agaou Misan, Agaou Potokli, Agaou Bèt Sansan(beast without blood)